Improvement in spark-arresters and consumers for locomotives



GEORGE H. GR|QGS- ShefS--Sheet Spark Arrester and Consumer. No. 120,638.Patentd N0v.'7,1a7i,

'rn'rs CFFIGE.

ENTd- GEORGE H. GRIGGS, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CHARLESF. PIKE, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN SPARK-ARRESTERS AND CONSUMERS FOR LOCOMOTIVES.

Specication forming part of Letters Patent No. 120,638, dated November7, 1871.

To all whom it may concern:

Be it known that I, GEORGE H. Gnrees, of the city and county ofWorcester, in the Colnmonwealth of Massachusetts, have invented a newand useful Improvement in Locomotive and other Engines; and I do herebydeclare that the following specification, taken in connection with thedrawing making a part of the same, is a full, clear, and exactdescription thereof.

Figure l, Sheet 1, is a side elevation of a locomotive-boiler and aportion of the engine. Fig. 2, Sheet l, is an end elevation of the same.Figs. l and 2, Sheet 2, are similar views to Sheet l, showing somevariations in construction.

The object of my invention is to arrest and convey back to the fire-boxthe sparks, cinders, smoke, and gases which are now discharged from thesmoke-stack of the engine, and thus not only relieve the passengers fromgreat annoyance and inconvenience arising from their escape, but, at thesame time, materially reduce the, amount of fuel consumed, as well as toavoid the damage so often resulting from the iiying sparks; and consistsin the devices for such purposes hereinafter described.

In the drawings, A is the boiler; B, the iirebox; C, the smoke-arch,containing the petticoat-pipes d d d and exhaust-pipe E. F is the insidesmokepipe, and G the outside smokepipe.

It is well understood that in the engines now in use the smoke, sparks,and cinders after leaving the fire-box B pass through the tubes oftheboiler to the smoke-arch C, when the exhaust steam from the pipe Ecreates a draught that forces them into and through the petticoat d andthe inner smoke-pipe F, from which they pass into the outer smoke-pipe Gand escape.

In my invention I attach to the inside of the pipe G, near the top, bymeans of rods a, a, a bell-shaped pipe, I, having its mouth directlyover the inner smoke-pipe F, while its smaller end projects through andis connected to the pipe K by the pipe L. The pipe K partially surroundsthe boiler and is connected with the fire-box B by the pipes M, and acommunication from the smoke-pipe to `the fire-box thus established.Within the larger end of the bellshaped pipe I may be placed an invertedcone, N, having the diameter of its base smaller than the insidediameter of the'pipe, as shown in Fig.

1, Sheet l, which tends to increase the force of the draught in thespace around it. Instead of the cone N a barrel-netting, b, Fig. I,Sheet 2, may be used, which is attached to the bell-shaped pipe I andextends down over the end of the pipe F, which prevents the divergenceof the cinders and sparks. The cone and netting may, however, be usedtogether in combination if desired, and the pipe F dispensed with.

The operation of my invention is as follows: The cinders, sparks, smoke,and gases having passed through the tubes in the boiler are forcedthrough the petticoat-pipes d and the pipe F, as already described, bythe exhaust steam, when, instead of escaping from the smoke-stack, theyare received within the bell-shaped pipe I and carried on by the draughtthrough the pipes L, K, and to the iirebox B, having been renderedcombustible in their passage by the action upon them of the exhauststeam.

The opening in the outer smoke pipe G, through which extends the smallend of the bellshaped pipe I, may be larger than the diameter of saidpipe I, as shown in Fig. 1, Sheet 2, and the pipe L, which connects itwith the pipe K, may also exceed it in diameter, so that, in case thereshould be any loose cinders or sparks, the downward draught will conveythem into the fire-box B.

I provide the pipe K with a damper, O, as shown in Fig. 2, Sheet 1,which may be closedy when the engine is at rest, or at such other timesas it may be necessary to stop the draught.

I am aware that a patent for a sparkarrester was granted to one DavidMathew, February 20, 1849, and reissued February 26, 1856 5 but I do notclaim as my invention anything covered by said patents, but considerthere is a clear patentable difference between such invention and myown; but

What I claim as my invention, and desire to secure by Letters Patent,is-

l. The inverted bell-mouth pipe I, either separately or with a cone, N,or netting b, in combination With pipe E and furnace B, al1 arranged thecinders, sparks, &c., discharged from said substantially in the mannerand for the purpose pipe F, in the manner and for the purposes specisetforth. ed

2. The inverted bell-mouth pipe I, either sep- GEORGE H. GRIGGS. aratelyor with a cone, N, or a netting, b, in Witnesses: combination with thepipes G and F, so arranged JAMES W. BLAGKWOOD,

with reference to said pipe F that it will receive WALTER B. VINCENT.(94)

